Diff: MAX7314.cpp

Revision:

0:7e32b01354d3

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MAX7314.cpp	Wed Apr 13 23:17:22 2011 +0000
@@ -0,0 +1,211 @@
+/*
+
+    MAX7314.cpp
+
+    Library implementation file for the MAX7314 16-bit I/O Expander with PWM
+
+    Tom Gambone
+    Chad Joppeck
+
+    Based on code by mBed user: "Ale C.-" / Suky (PCA9538_Expander Library)
+
+    4/13/2011 - Initial porting
+
+*/
+
+#include "mbed.h"
+
+
+
+
+//*****************************************************************************
+
+
+
+MAX7314_OutputPin::MAX7314_OutputPin(ExpPinName Pin,PinName PIN_SDA,PinName PIN_SCL,unsigned char Address)
+        :Bus(PIN_SDA,PIN_SCL),_Pin(Pin),_Address(Address<<1) {
+
+    unsigned char Temp;
+
+    Bus.start();
+    Bus.write(_Address & 0xFE);
+    Bus.write(0x03);
+    Bus.start();
+    Bus.write(_Address | 0x01);
+    Temp=Bus.read(0);
+    Bus.stop();
+
+    Bus.start();
+    Bus.write(_Address & 0xFE);
+    Bus.write(0x03);
+    Bus.write((~(0x01<<_Pin))&Temp);
+    Bus.stop();
+}
+
+void MAX7314_OutputPin::vWrite(int value) {
+    unsigned char Temp;
+
+    Bus.start();
+    Bus.write(_Address & 0xFE);
+    Bus.write(0x01);
+    Bus.start();
+    Bus.write(_Address | 0x01);
+    Temp=Bus.read(0);
+    Bus.stop();
+
+    Bus.start();
+    Bus.write(_Address & 0xFE);
+    Bus.write(0x01);
+    if (value==0) {
+        Bus.write((~(0x01<<_Pin))&Temp);
+    } else {
+        Bus.write((0x01<<_Pin)|Temp);
+    }
+    Bus.stop();
+}
+
+int MAX7314_OutputPin::read() {
+    unsigned char Temp;
+
+    Bus.start();
+    Bus.write(_Address & 0xFE);
+    Bus.write(0x01);
+    Bus.start();
+    Bus.write(_Address | 0x01);
+    Temp=Bus.read(0);
+    Bus.stop();
+
+    return((Temp>>_Pin)&0x01);
+}
+
+MAX7314_OutputPin& MAX7314_OutputPin::operator= (int value) {
+    vWrite(value);
+}
+
+MAX7314_OutputPin::operator int() {
+
+    return(read());
+}
+
+
+
+//*****************************************************************************
+
+
+
+MAX7314_InputPin::MAX7314_InputPin(ExpPinName Pin,PinName PIN_SDA,PinName PIN_SCL,unsigned char Address)
+        :Bus(PIN_SDA,PIN_SCL),_Pin(Pin),_Address(Address<<1) {
+    unsigned char Temp;
+
+    Bus.start();
+    Bus.write(_Address & 0xFE);
+    Bus.write(0x03);
+    Bus.start();
+    Bus.write(_Address | 0x01);
+    Temp=Bus.read(0);
+    Bus.stop();
+
+    Bus.start();
+    Bus.write(_Address & 0xFE);
+    Bus.write(0x03);
+    Bus.write((0x01<<_Pin)|Temp);
+    Bus.stop();
+}
+
+int MAX7314_InputPin::read() {
+    unsigned char Temp;
+
+    Bus.start();
+    Bus.write(_Address & 0xFE);
+    Bus.write(0x00);
+    Bus.start();
+    Bus.write(_Address | 0x01);
+    Temp=Bus.read(0);
+    Bus.stop();
+
+    return((Temp>>_Pin)&0x01);
+}
+
+MAX7314_InputPin::operator int() {
+
+    return(read());
+}
+
+
+
+//*****************************************************************************
+
+
+
+MAX7314::MAX7314(PinName PIN_SDA,PinName PIN_SCL,unsigned char Address,PinName PIN_INT)
+        : Bus(PIN_SDA,PIN_SCL),_PIN_INT(PIN_INT),MAX7314_Event(PIN_INT) {
+    _Address=Address<<1;
+}
+
+void MAX7314::vInit(unsigned char Dir,void (*fptr)(void)) {
+
+    //Bus.frequency(400000);
+
+    Bus.start();
+    Bus.write(_Address & 0xFE);
+    Bus.write(0x03);
+    Bus.write(Dir);
+    Bus.stop();
+
+    if (fptr!=NULL) {
+        MAX7314_Event.fall(fptr);
+    }
+}
+
+void MAX7314::vSetConfiguration(unsigned char Dir) {
+
+    Bus.start();
+    Bus.write(_Address & 0xFE);
+    Bus.write(0x03);
+    Bus.write(Dir);
+    Bus.stop();
+}
+
+void MAX7314::vSetPolarity(unsigned char Pol) {
+
+    Bus.start();
+    Bus.write(_Address & 0xFE);
+    Bus.write(0x02);
+    Bus.write(Pol);
+    Bus.stop();
+}
+
+unsigned char MAX7314::cRead(void) {
+    unsigned char Temp;
+
+    Bus.start();
+    Bus.write(_Address & 0xFE);
+    Bus.write(0x00);
+    Bus.start();
+    Bus.write(_Address | 0x01);
+    Temp=Bus.read(0);
+    Bus.stop();
+
+    return(Temp);
+}
+
+void MAX7314::vWrite(unsigned char Data) {
+
+    Bus.start();
+    Bus.write(_Address & 0xFE);
+    Bus.write(0x01);
+    Bus.write(Data);
+    Bus.stop();
+}
+
+void MAX7314::vEnableSetInterrupt(void (*fptr)(void)) {
+    MAX7314_Event.fall(fptr);
+}
+
+void MAX7314::vDisableInterrupt(void) {
+    MAX7314_Event.fall(NULL);
+}
+
+bool MAX7314::bReadPinINT(void) {
+    return(_PIN_INT);
+}